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(No Model.) 2 Sheets-Sheet 1.

B. R. BLOOD. LAMPBLAOK MACHINE.

No. 480,990. Patented Augyl6, 1892.

WILHEEEE5- (2&1

(No Model.) 2 Sheets-Sheet 2.

E. R. BLOOD.

LAMPBLAGK MACHINE. No. 480,990. Patented Aug. 16, 1892.

fi 4; W11; nE55E5- lnvE nLn NITED STATES I "ATENT FFioE.

ERASTUS R; BLOOD; OF KANE, PENNSYLVANIA, ASSIGNOR TOMARTHA P. BLOOD, OF SAME PLACE.

LAM P-BLACK MACHINE.

SPECIFICATION forming part of Letters Patent No. 480,990, dated August 16, 1892.

Application filed October 28, 1891. Serial Ila 410,116. (No model.)

full, clear, and exact description of the inven tion, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to machines for making lamp-black from a gas-flame; and it consists in certain improvements in the construc-.

tion thereof, as will be hereinafter fully described, and pointed out in the claims.

My invention is illustrated in the accompanying drawings, as follows:

Figure 1 is a vertical sectional view taken in the plane of the shaft B. Fig. 2 is a top plan view. 7 1 The construction, as represented, is as folows:

A A mark the depositing-plates, of which there are two, which are circular and concentrically mounted on a common central post B. These plates lie in a common horizontal plane, as shown, and their contiguous edges do not meet, but are slightly separated, so as to form a narrow vent or opening a between them. The plate A is connected by arms 01 with a beveled gear D, and the plate A is connected with a beveled gear D. On the shaft B, which is journaled in the box I) on the top of the post B, there are beveled pin ions (3 and O, which respectively mesh with the gears D and D. The arrangement of this gearing is such that the two plates will move at different speeds as the shaft B is revolved, and, if desired, by placing the pinion (l as shown by dotted lines in Fig. 2 the plates may be moved in opposite directions. The

essential thing in this respect is that the two plates shall have different movements either in direction or in speed, so if they move in different directions they may move at the same speed, if desired; but if they move in the same direction they should move at different speeds. The object of this will appear later on.

E are the gas-supply pipes, e the gas-burners, and F the gas-flames. It will be seen that the gas-flames impinge upon theplates at their point of meetingthat is, immediately below the opening a-so that part of the flame impinges on one plate and part on the other.

sary that the vent or opening a be kept open,

and heretofore a cleaner has been moved through it at intervals.

I have found that the vent a can be kept open best by moving the two plates either in opposite directions or at different speeds, in

which case no cleaning device is required,

because the vent will not become clogged at all, as the differential movement of the plates, whether they be circular in form, as shown, or otherwise, will prevent lamp-black from accumulating in the vent-opening a.

The means for removing the lamp-black from the plates forms no part of this invention and is not illustrated.

What I claim as new is- 1. In a lamp-black machine, the combination, with the plates A and A, arranged substantially as shown, with an opening a between th eircontiguous edges, and a gas-burner arranged to impinge its flame upon said plates on opposite sides of said opening, of means, substantially as shown, for moving said plates in a common horizontal plane over said flame differentially, whereby the said opening will be kept clear of lamp-black, as set forth.

2. In a lamp-black machine, the combination, with the circular concentric plates A and A, arranged substantially as shown, with an opening a between their contiguous edges,

and a gas-burner arranged to impinge its flame upon said plates on opposite sides of saidopening,ofmeans,snbstantia11yas shown, C D and C D for moving said plates rotafor moving said plates in acommon horizontal tively and dilferentially, substantially as set plane over said flame dilferentially, whereby forth.

the said opening Will be kept clear of lamp- In testimony whereoflaffix my signature in 5 black, as set forth. presence of two Witnesses.

3. In a lamp-black machine, the combination of the burners e, the circular concentric ERASTUS R. BLOOD. plates A A, arranged in a common horizontal Witnesses: plane and having an opening a between them N. M. ORR,

10 directly over said burners, and the gearing FRANK D. EVANS. 

